<?php
/**
 * @package php-font-lib
 * @link    https://github.com/PhenX/php-font-lib
 * @author  Fabien Ménager <fabien.menager@gmail.com>
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 */

namespace isszz\captcha\font\lib\table\type;
use isszz\captcha\font\lib\table\Table;

/**
 * `hhea` font table.
 *
 * @package php-font-lib
 */
class hhea extends Table
{
	protected $def = [
		"version"             => self::Fixed,
		"ascent"              => self::FWord,
		"descent"             => self::FWord,
		"lineGap"             => self::FWord,
		"advanceWidthMax"     => self::uFWord,
		"minLeftSideBearing"  => self::FWord,
		"minRightSideBearing" => self::FWord,
		"xMaxExtent"          => self::FWord,
		"caretSlopeRise"      => self::int16,
		"caretSlopeRun"       => self::int16,
		"caretOffset"         => self::FWord,
		self::int16,
		self::int16,
		self::int16,
		self::int16,
		"metricDataFormat"    => self::int16,
		"numOfLongHorMetrics" => self::uint16,
	];

	public function _encode()
	{
		$font                              = $this->getFont();
		$this->data["numOfLongHorMetrics"] = count($font->getSubset());

		return parent::_encode();
	}
}